package hadoop;


import java.io.IOException;
import java.util.*;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.conf.*;
import org.apache.hadoop.io.*;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapreduce.*;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.input.TextInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;

public class CPVCount {

	public static class Map extends Mapper<LongWritable, Text, Text, IntWritable> {
		private final static IntWritable one = new IntWritable(1);

		public void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
			String line = value.toString();
			StringTokenizer tokenizer = new StringTokenizer(line,";");
			Text cpvCode = new Text(tokenizer.nextToken());
			while (tokenizer.hasMoreTokens()) {	
				String text = tokenizer.nextToken();
				System.out.println("Processing code "+cpvCode.toString()+" string value "+text);
				context.write(cpvCode, one);
			}
		}
	} 

	public static class Reduce extends Reducer<Text, IntWritable, Text, IntWritable> {

		public void reduce(Text key, Iterable<IntWritable> values, Context context) 
				throws IOException, InterruptedException {
			int sum = 0;
			for (IntWritable val : values) {
				sum += val.get();
			}
			context.write(key, new IntWritable(sum));
		}
	}

//	public static void main(String[] args) throws Exception {
//
//		JobConf conf = new JobConf(CPVCount.class);
//		Job job = new Job(conf, "cpvcount");
//
//		job.setOutputKeyClass(Text.class);
//		job.setOutputValueClass(IntWritable.class);
//
//		job.setMapperClass(Map.class);
//		job.setReducerClass(Reduce.class);
//
//		job.setInputFormatClass(TextInputFormat.class);
//		job.setOutputFormatClass(TextOutputFormat.class);
//
//		FileInputFormat.addInputPath(job, new Path(args[0]));
//		FileOutputFormat.setOutputPath(job, new Path(args[1]));
//
//		job.waitForCompletion(true);
//	}

}